A cobpobation of illi



UNITED STATES PATENT oEEIoE.

REUBEN B. BENJAMIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN ELECTRIC MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 01? ILLI- NOIS.

ATTACHMENT-PLUG.

Application filed November 5, 1915.

To all whom it may concern:

Be it known that I, REUBEN B. BENJAMIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Attachment-Plugs, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to attachment plugs. Receptacles are often located in positions in which they are hard to get at with the ordinary attachment plug, also some shades are so narrow that it is difficult to insert a plug in the lamp socket without removing the shade.

One of the objects of my invention is to provide an improved means whereby a plug can be inserted in such sockets without removing the shade.

It is also often the case that sockets are located at such a height that it is difiicult to reach them with the ordinary plug.

Another object of my invention is to provide an improved plug having an extension handle whereby such sockets can be reached.

In the drawings, in which I have shown one embodiment of my invention Figure 1 is a side elevation of my improved plug showing a socket and shade in broken lines; and

Fig. 2 is a View partly in section showing the interior construction of the plug.

Referring now to the drawings in detail, I have shown my invention in connection with an ordinary lamp socket 10, and a narrow shade 11, secured to the socket by a shade holder 12 of any desired construction. The attachment plug 13 is provided with shell and center contacts 15 and 16, respectively, and binding terminals 17 and 18 respectively, to which the conductors 19 and 20 are connected. The shell contact 15 is mounted to swivel so that the plug can be inserted without twisting the conductors 19 and 20. An insulating band 21 is provided around the lower end of the shell contact and an insulating ring 22 is secured to the lower end thereof. For retaining the threaded shell in place on the plug and also for gripping the conductors to take the strain ofi" of the binding posts a thumb piece 23 is provided Specification of Letters Patent.

Patented Jan. 20, 1920.

Serial No. 59,800.

the base 27 on which the binding terminals are mounted. This base, 27 is provlded with a central abutment 28 which cooperates with the sleeve portion 25 to grip the conductors 19 and 20 to take the strain off of the binding posts. Secured to the insulating ring 22 by means of a cupshaped sheet metal connecting member 29 is a flexible tubular member 30 forming an extension handle, and also a conduit for the conductors 19 and 20.

The member 29 comprises an annular bead portion 31 which is secured firmly to the insulating ring 22, and a sleeve portion 32 which is secured to the tubular member 30 in any suitable manner, and is provided with a plurality of openings 33 permitting access to the thumb piece 23 whereby the latter may be rotated to grip the conductors. The tubular member 30 may be formed of ordinary flexible metal tubing or sheathing and may terminate in a sleeve 34 secured to the tubing by being flanged over as shown at 35 forming a smooth finish for the end of the tubing.

In wiring the plug the thumb piece 23 is unscrewed fromthe threaded shell 26 permitting the base 27 with the shell 26 to be withdrawn from the shell contact 15. The conductors 19 and 20 are then threaded through the tubing 30 and thumb piece 23 and through the base 27 in position to be enga ed by the binding terminals 17 and 18. The base 27 is then slipped back into the shell contact 15 and the thumbpiece 23 is screwed into the threaded sleeve 26 to hold the parts firmly in place and to grip the conductors. As previously stated the openings in the cup-shaped member 29 permit the thumb piece 23 to be rotated inside of the cup-shaped member. In inserting the plug in the socket the tubular member 30 may be grasped at any point in its length and the plug inserted in places which would be out of reach or inaccessible to the ordinary plug.

The tubular member 30 not only serves as a handle, but also lessens the wear on the insulation of the conductors by preventing its being bent at sharp angles and around sharp corners.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. An attachment plug comprising an insulating base, a center contact supported thereby, a shell contact rotatably mounted with respect to said insulating base, and a flexible extension handle connected to said shell contact for rotating it.

2. An attachment plug comprising an insulating base. a binding terminal supported thereby, cord gripping means cooperating therewith comprising a member mounted for axial rotation with respect to said plug, a shell contact rotatably mounted with respect to said insulating base, and an extension handle connected to said shell contact for rotating it, said extension handle comprising a sheet metal member connected to said shell contact and surrounding the rotatable member of said cord gripping means. i

3. An attachment plug comprising an insulating base, a binding terminal supported thereby, cord gripping means cooperating therewith comprising a member mounted for axial rotation with respect to said plug, a shell contact rotatably mounted with respect to said insulating base, an extension handle connected to said shell contact for rotating it, said extension handle comprising a sheet metal member connected to said shell contact and surrounding the rotatable member of said cord gripping means, and a flexible conduit secured to said sheet metal member.

4. An attachment plug comprising an insulating base, a binding terminal supported thereby, cord gripping means cooperating therewith comprising a member mounted for axial rotation with respect to said plug, a shell contact rotatably mounted with respect to said insulating base, and an extension handle connected to said shell contact for rotatin it, said extension handle comprising a s eet metal member connected to said shell contact and surrounding the rotatable member of said cord gripping means,

thereby, a screw shell contact rotatablymounted with respect to said base, and a tubular flexible handle connected to said screw shell for screwing it into a socket, said tubular handle forming a passage for the conductor for said contact.

6. An attachment plug, comprising shell and center contacts and wiring terminals therefor, said shell contact being swiveled with respect to said wiring terminals, whereby the threaded shell may be screwed into the socket without twisting the conductors leading to said wiring terminals, and a flexible tubular extension handle secured to said threaded shell for screwing said threaded shell into the socket, said tubular handle surrounding the conductors leading to said wiring terminals and forming a passage therefor, and being rotatable about said conductors, whereby the conductors will not be twisted by said extension handle when the plug is screwed in.

T. in attachment plug comprising shell and center contact and wiring terminals therefor, said shell contact being swiveled with respect to said wiring terminals, whereby the threaded shell may be screwed into the socket without twisting the conductors leading to said wiring terminals, and a tubular extension handle secured to said threaded shell and of smaller diameter than said threaded shell for screwing said threaded shell into the socket, said tubular extension handle closely surrounding the conductors witnesses.

REUBEN B. BENJAMIN. Witnesses:

P. D. PHILLIPS, M. J. CLEARY. 

